17 def do_OP_VER(stack):  argument
21 def do_OP_RESERVED1(stack):  argument
25 def do_OP_RESERVED2(stack):  argument
29 def do_OP_RETURN(stack):  argument
33 def do_OP_2DROP(stack):  argument
34     stack.pop()
35     stack.pop()
38 def do_OP_2DUP(stack):  argument
40     stack.append(stack[-2])
41     stack.append(stack[-2])
44 def do_OP_3DUP(stack):  argument
46     stack.append(stack[-3])
47     stack.append(stack[-3])
48     stack.append(stack[-3])
51 def do_OP_2OVER(stack):  argument
53     stack.append(stack[-4])
54     stack.append(stack[-4])
57 def do_OP_2ROT(stack):  argument
59     stack.append(stack.pop(-6))
60     stack.append(stack.pop(-6))
63 def do_OP_2SWAP(stack):  argument
64     stack.append(stack.pop(-4))
65     stack.append(stack.pop(-4))
68 def do_OP_IFDUP(stack):  argument
69     if stack[-1]:
70         stack.append(stack[-1])
73 def do_OP_DROP(stack):  argument
74     stack.pop()
77 def do_OP_DUP(stack):  argument
78     stack.append(stack[-1])
81 def do_OP_NIP(stack):  argument
82     v = stack.pop()
83     stack.pop()
84     stack.append(v)
87 def do_OP_OVER(stack):  argument
88     stack.append(stack[-2])
91 def do_OP_ROT(stack):  argument
92     stack.append(stack.pop(-3))
95 def do_OP_SWAP(stack):  argument
96     stack.append(stack.pop(-2))
99 def do_OP_TUCK(stack):  argument
100     v1 = stack.pop()
101     v2 = stack.pop()
102     stack.append(v1)
103     stack.append(v2)
104     stack.append(v1)
107 def do_OP_CAT(stack):  argument
108     v1 = stack.pop()
109     v2 = stack.pop()
110     stack.append(v2 + v1)
113 def do_OP_RIPEMD160(stack):  argument
114     stack.append(ripemd160(stack.pop()).digest())
117 def do_OP_SHA1(stack):  argument
118     stack.append(hashlib.sha1(stack.pop()).digest())
121 def do_OP_SHA256(stack):  argument
122     stack.append(hashlib.sha256(stack.pop()).digest())
125 def do_OP_HASH160(stack):  argument
126     stack.append(hash160(stack.pop()))
129 def do_OP_HASH256(stack):  argument
130     stack.append(double_sha256(stack.pop()))